My new pacman is a stubborn feeder too, all he wants is crickets. That is what he is used to and recognizes as food. Tonight after starving him for two days, I tried nightcrawlers again. No go. So I broke down and put some crickets in there. Then I got a idea. When he would strike at a cricket, I held the nightcrawler in tongs in front. Yes! He ate it. After a few times of that, he realized that those slimy things were food too and would take them on his own! Ate about 1/2 a crawler tonight. (oh I also feed in a separate container. That way he doesn't accidentaly eat some cocofiber)